So far there's been a worrying lack of skills among these so-called professionals, but anyone who's ever worked in a certain sort of chain pub or restaurant knows that pressing start on the microwave is often enough to earn a chancer in a white hat the title of chef. Gregg Wallace and Michel Roux Jr are nice enough about any deficiencies, although it doesn't fly with the surprise star of the show, Michel's sous-chef Monica Galetti. Another quarter-final follows the heats.

Micro Men

9pm, BBC4

In his many TV appearances of the 1980s, Sir Clive Sinclair appeared to be very much the epitome of gentle British boffinery. Behind the scenes, though, this radio and electronics expert-turned-business man was altogether tougher: a hugely driven, ashtray-chucking inventor on a mission to dominate the home-computing marketplace. In the grand tradition of British fact-based drama (batty chaps in Fair Isle sweaters unravelling the double helix, etc), Micro Men finds the personalities behind the science, and grants them their unlikely time in the spotlight.

Alex: A Passion for Life

9pm, Channel 4

Last year, Cutting Edge followed teenage prodigy Alex Stobbs as he prepared to conduct Bach's Magnificat at his school, Eton, while fending off the crippling effects of cystic fibrosis. Now a choral scholar at King's College, Cambridge, where he has to be wired up to a tube feed every night, Alex is taking on another challenge: the exhausting, three-hour- long St Matthew Passion. An inspirational kind of chap, Alex views a few weeks in hospital as a fair exchange for the privilege of doing something extraordinary. A screening of the concert itself follows directly afterwards on More4.

Scrubs

9pm, E4

Axed by NBC last year, Scrubs was then picked up by ABC for its eighth season, meaning it has now outlived ER, the show it originally set out to parody. On the basis of these first two episodes, broadcast back-to-back by E4, not much has changed at Sacred Heart Hospital. Courteney Cox and rising US comedian Aziz Ansari join the relentlessly wisecracking staff, but overall the disparity between how funny Scrubs thinks it is, and how funny it actually is, remains significant.